Gegner Dam Reservoir Report
Nearby: Andriano Dam Thacther Dam
Last Updated: December 13, 2025
Gegner Dam, located in Norwalk, Iowa, serves as a crucial water resource for fire protection, stock, and small fish pond purposes.
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Summary
The earth dam, completed in 1999, stands at a height of 31 feet and stretches 630 feet in length, with a storage capacity of 113 acre-feet. The dam is regulated by the Iowa Department of Natural Resources, ensuring its safety and compliance with state standards.
Despite its low hazard potential and satisfactory condition assessment, Gegner Dam is subject to moderate risk due to its location on Tr- Badger Creek. The dam features an uncontrolled spillway and was last inspected in 2009. It is essential for water resource and climate enthusiasts to monitor the risk management measures in place for Gegner Dam and stay informed on any updates regarding its operations and maintenance to ensure the continued safety and functionality of this important infrastructure.
Year Completed |
1999 |
Dam Length |
630 |
Dam Height |
31 |
River Or Stream |
Tr- Badger Creek |
Primary Dam Type |
Earth |
Surface Area |
7 |
Drainage Area |
0.58 |
Nid Storage |
113 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
31 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Raccoon River Near West Des Moines
|
1300cfs |
Raccoon River At 63rd Street At Des Moines
|
587cfs |
North River Near Norwalk
|
48cfs |
Walnut Creek At Des Moines
|
10cfs |
Raccoon River At Van Meter
|
1640cfs |
Raccoon River At Fleur Drive
|
1200cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Gegner Dam
Walnut Woods Drive West Des Moines